Baculoviridae

Definition

A family of large, enveloped, double-stranded DNA viruses that infect arthropods, particularly insects. Baculoviridae comprises four genera—Alphabaculovirus (nucleopolyhedroviruses), Betabaculovirus (granuloviruses), Gammabaculovirus, and Deltabaculovirus—distinguished by virion structure and occlusion body morphology. These viruses produce two phenotypes during infection: budded virus for cell-to-cell spread and occlusion-derived virus for host-to-host transmission via protective protein crystals (polyhedra or granules). Members are significant in applied entomology as species-specific biological control agents against lepidopteran crop pests and as expression vectors in molecular biology.

Etymology

From Baculovirus (Latin baculum, 'rod' or 'staff,' referring to the rod-shaped virion) + -viridae (family suffix for viruses).

Example

Autographa californica multiple nucleopolyhedrovirus (AcMNPV), the type species of Alphabaculovirus, is widely used to produce recombinant proteins in lepidopteran cell culture and as a bioinsecticide against noctuid pests such as cabbage looper and soybean looper.

Related Terms

• nucleopolyhedrovirus
• Granulovirus
• polyhedrin
• occlusion body
• Biological control
• entomopathogenic virus
• insect cell culture
• Sf9 cells

Usage Notes

Baculoviridae is a family-level taxon; use the genus name (e.g., Alphabaculovirus) or species epithet (e.g., AcMNPV) when referring to specific viruses. The family is sometimes informally called 'baculoviruses,' though this properly refers to members of the group rather than the taxon itself. Host range varies dramatically among species: some infect single host species, while others cross genera within Lepidoptera. Distinguish from bacterial entomopathogens such as Bacillus thuringiensis; baculoviruses are obligate intracellular parasites with no extracellular growth phase.